1.	Simplify 1 Simplify the following expression: $$ {\left(4 + 5\right)}^{2} - \left(4(-1) + 1\times4\right) $$ Correct Answer $$ 81$$ or 81.0000

2.	Simplify 2 Simplify the following expression: $$ 2\left(-5 - -6\right)\left(-6\times5 - {6}^{6}\right) $$ Correct Answer $$ -93372$$ or -93372.0

3.	Fractions 1 Simplify the following expression: $$ \frac{-3}{4} + \frac{1}{6} $$ Correct Answer $$ \frac{-7}{12}$$ or -0.5833333333333334

4.	Fractions 2 Simplify the following expression: $$ \frac{-1}{3}\frac{-1}{2} $$ Correct Answer $$ \frac{1}{6}$$ or 0.16666666666666666

5.	Significant figures 1. Write the following to 2 significant figures: 0.00025748849 Correct Answer 0.00026 or $$2.6\times10^{-4}$$ 2. Write the following to 3 significant figures: 7.8039966 Correct Answer 7.80 or $$7.80\times10^{0}$$

6.	Standard Form 1. Write the following in standard form to 2 significant digits: 0.0000000167321 Correct Answer $$1.7\times10^{-8}$$ 2. Write the following in standard form to 3 significant digits: 0.000000333832 Correct Answer $$3.34\times10^{-7}$$

7.	Significant figures 1. Write the following in preferred standard form to 2 significant digits: 70.26 Correct Answer $$70\times10^{0}$$ 2. Write the following in preferred standard form to 4 significant digits: 563827 Correct Answer $$563.8\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ {\left(6\times5 + \frac{-2}{3}\right)}^{2{(-4)}^{5}} $$ Correct Answer $$ {\left(\frac{88}{3}\right)}^{-2048}$$ or 0.0

9.	Simplify 1 Simplify the following expression: $$ 2(-4)5\left(5\times4 + -4 - -3\right) $$ Correct Answer $$ -760$$ or -760.000

10.	Simplify 2 Simplify the following expression: $$ \frac{2\left(2 - 5\right)}{-5 + -4 - \frac{4}{6}} $$ Correct Answer $$ \frac{18}{29}$$ or 0.620690